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Note 3 - Revenue - Disaggregation of Revenue by Major Categories and Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net sales	$ 91,671	$ 96,859
UNITED STATES
Net sales	65,368	67,702
Non-US [Member]
Net sales	26,303	29,157
Pumps and Pump Systems [Member]
Net sales	78,299	82,522
Repair Parts for Pumps and Pump Systems and Other [Member]
Net sales	$ 13,372	$ 14,337

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

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